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NASA's Orion spacecraft enters orbit around the moon and captures stunning new images of the lunar surface and its craters.

A volcano that has been dormant for 800 years has shown signs of activity and caused a series of small earthquakes.

NASA's Orion spacecraft makes its closest approach to the moon and was able to capture stunning images of the Earth and the lunar surface as part of the Artemis mission.

This book offers a general review of the voluminous theoretical and experimental literature pertaining to physical self-replicating systems and self-replication. The principal focus here is on self-replicating machine systems. Most importantly, we are concerned with kinematic self-replicating machines: systems in which actual physical objects, not mere patterns of information, undertake their own replication. Following a brief burst of activity in the 1950s and 1980s, the field of kinematic replicating systems design received new interest in the 1990s with the emerging re...